Winder-shaft collar.



G. A..JOHNSON.

WINDER SHAFT COLLAR.

APPLICATION FILED AUG.5. 1915.

Lwm. Patented May 16, 1916.

q L22 20 "I, I f, I g I ff/5 I l i GEORGE ADOLPH JOHNSON, 0F MUSKEGON,MICHIGAN.

winnen-snaar COLLAR.

Application filed August 5, 1915.

Vpansion shaft of paper slitting and winding machines for the purpose ofblocking or holdingthe ends of the paper roll being wound and slit.

In Winding a wide sheet of paper, being cut into several rolls on theWinder or expansion shaft, if there is any end slip of the paper, theseveral cuts will interlock so that when the Winder or expansion shaftis removed for the purpose of breaking the rolls apart, there will beimperfect ends on the rolls. A common practice is to catch a small ropeor binder twine several feet long around the Winder shaft While it is inmotion. This is a dangerous operation and causes many accidents.

My object is to provide an improved safety collar two of which can beinitially placed on the end portions of the Winder or eX- pansion shaftand, after the roll has assumed sufficient diameter to permit theimproved safety collars to be slid inwardly against the ends of thepaper roll, such action may be had with a result that the collars willautomatically grip the Winder or eX- pansion shaft and resist lateralspread or displacement of the paper roll being wound and cut into aplurality of rolls.

Vith my invention, the pressure of the paper roll being Wound, when ittends to work outwardly, longitudinally of the Winder shaft, results ina pressure on the collars which, by reason of the construction provided,causes the collars to tighten their grip on the Winder roll.

My invention embraces certain improved features and novel combinationsof parts, one embodiment of which I have set forth fully hereinafter andshown in the accompanying drawings, but I Wish it understood that thisis by Way of illustration of the invention and not in restriction of thescope thereof, as changes may he resorted to without affecting theprinciple of the invention.

Specification of Letters Patent.

Patented May Mi, fglltl.

Serial No. 43,726.

In the accompanying drawings: Figure l is a front view, of somewhatdiagrammatic character, showing a pair of the safety collars in use;Fig. 2, an end diagrammatic view of the rolls and drums of a paperwinding and slitting machine showing the arrangement when the paper webis first started on the Winder or expansion roll; Fig. 3, a longitudinaldetail section through the collar; Fig. 4f, a cross section on line H,Fig. 3; and Fig. 5, a detail perspective of one of the gripping dogs.

Referring first to Fig. 2, the driving drums are shown at l and thebinder roll at 2; the Winder or expansion roll is shown at 3. At thetime the paper Web a is started to wind on the roll 3, the drums androlls are in the position shown in Fig. 2. At the beginning of thewinding operation, the relatively small diameter of the shaft or roll 3prevents the placing of my improved safety collars in the properposition to prevent lateral spreading of the paper, but these safetycollars, shown, generally, at 5, Fig. l, may be first placed on theWinder roll 3 in the position shown in dotted lines, Fig. l, and whenthe web d has been wound around the roll 3 until the diameter of thewound roll is slightly greater than that of the safety collar 5, a stickmay be employed to push the safety collars up against the ends of thewound and slit paper roll 6, as shown in Fig. l. On further winding andslitting, the safety collars automatically, lock and retain themselvesin the position shown and the lateral pressure exerted by the wound roll6 only tends to cause the safety collars to grip the Winder roll 3 moretightly. rIhe safety collars, therefore, prevent lateral spreading ofthe roll 6, and consequently, the slitting is perfect and there is nointerlocking of the'several cuts 7 which define the plurality ofindependent rolls 8 wound on the roll 3. The ends of the respectiverolls 8 are, therefore, relatively smooth and perfect.

Having described the manner of use and operation, reference is to be hadto Figs. 3, 4, 5, for disclosure of the construction of the safetycollars 5. As the collars 5 are duplicates, a description of one will.suflice. The outer shell 9 is cylindrical on its eX- terior and providedat its inner end with an inwardly projecting iiange I0 Which is of asize adapted to accommodate the Winder or expansion roll 3 and alsoserves as a face to bear against the ends of the paper roll 6 and,

further, to prevent disconnection of the innerY locking mechanismcontained Withinl the shell 9. The shell 9 is of two differentdiameters, as shown at 11 and 12, the part 1l being nearest the flange10 and the part 12 leading in from the outer end of the shell 9. Theparts 11 and 12 are connected by a sloping or tapered annular portion 13which serves as a cam to cause the gripping dogs to operate. ContainedWithin the shell 9 is a cage or bushing 14 which has an annular flange15 adapted to coperate with the ring 16 secured to shell 9 to preventthe bushing from coming out of the shell 9, but the relationship of theparts is suoli that the cage or sleeve 14 may have a movement of limitedextent lengthwise within the shell 9. At its inner end the bushing orsleeve 14 has secured thereto by screws 17, a ring 18. Extendinglongitudinally of, and thro-ugh the walls of the bushing 14 are slots 19in which play the gripping dogs 20 which are pivoted at their inner endsso that they can expand and contract radially of the bushing, by screws21 which are I loosely set in holes 22 in the ring 18. The

free ends of the dogs overlap the bushing and are pressed outwardly byvsuitable springs 23. The outer faces of the dogs comprise a part 24substantially flush with the exterior of the bushing or sleeve 14, apart 25 adapted to bear against the surface 12 and an inclined or campart 26 which may be made to engage the inclined annular surface 13 whenthe bushing 14 is pushed inwardly in relation to the shell 9. hen thebushing is slightly projected, the cam surfaces 26 and 13 are free ofeach other and the springs then expand the dogs so that they do not gripthe Winder shaft 3, but when vthe bushing is pushed into the shell 9,the cam surfaces come together and the inner gripping faces of the dogsthen bear against the Winder shaft 3. This is the action which occurswhen the safety collars are pushed inwardly from the dotted line y tothe full line position of Fig. 1. A similar effect is obtained by thelateral pressure exerted by the outermost paper rolls 8 as they pressagainst the shell 9 and hence the dogs are made to even more tightlygrip the Winder shaft 3, due to such pressure.

I preferably provide on the inner faces of the dogs rubber or frictionfacings or pads 27 which may usually be suflicient to hold the collar,but in addition thereto, there are provided teeth, projections orcorrugations 28 so that if the gripping pads 27 fail to hold the collar,through wear or too great pressure, the teeth will bite into the shaftor roll 3 and hold the collar.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. A collar for Winder rolls comprising an outer shell, an innerbushing, said shell and bushing being relatively, freely slidable andlocking dogs or grippers adapted to be set or released by relativesliding movement of said shell and bushing.

2. A collar for Winder rolls comprising an outer shell and an innerbushing adapted for relative free, sliding movement, and locking dogscarried by the bushing adapted to coperate with the shell to be set whenthe shell moves in a given direction andv for release when said shellmoves in an opposite direction.

3. A collar for Winder rolls comprising an outer shell and an innerbushing` adapted for relative free, sliding movement, locking dogscarried by the bushing, a cam surface being provided on the shelladapted to actuate said dogs.

4. A collar for Winder rolls comprising an outer shell and an innerbushing adapted for relative free, sliding movement, locking dogs hingedor pivoted to the bushing and provided with cam faces, and spring meansfor actuating said dogs, a cam member being provided on the shelladapted to coperate with the dogs.

In testimony whereof, I hereunto afiix my signature.

GEORGE ADOLPH JOHNSON.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

